JPH0156948B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-wheeled agricultural work vehicle, and its purpose is to improve operating efficiency by allowing various attachments for various tasks and dump beds to be replaced and removed as appropriate, and to improve operating efficiency. The purpose is to make it easy to attach and detach the device, and to reduce the cost of improvement.

The characteristic configuration of the multi-wheeled agricultural work vehicle according to the present invention is as follows:
A pedestal for an agricultural attachment having ground support legs that can be freely switched between a supporting state and a retracted state is provided so as to be movable up and down, and a connecting portion for removably pivotally connecting a dump loading platform is provided, and the pedestal and the dump The loading platform is provided with a hydraulic cylinder that can be selectively interlocked, and its functions and effects are as follows.

In other words, by being equipped with a cradle for various agricultural attachments and a connection part that removably connects the dump platform, it becomes possible to perform a wide variety of tasks while replacing and attaching these attachments and dump platforms as appropriate. As a result, we were able to significantly improve the operating rate and greatly reduce the economic burden on the user side.

In addition, by providing the pedestal so that it can be raised and lowered, the legs for supporting the ground of the attachment can be switched to the supporting posture while the pedestal with the attachment attached is raised, and the legs can be moved by lowering the pedestal in that state. By making the attachment self-supporting on the ground by grounding the body, and then separating the self-supporting attachment and the pedestal by lowering the pedestal, it is extremely easy to remove the attachment and install it by reversing the procedure. I was able to do it.
As a result, we were able to greatly improve work efficiency.

Furthermore, by focusing on the fact that the pedestal and the dump bed are not used at the same time, the hydraulic cylinder, the pedestal, and the dump bed can be selectively linked to each other, thereby driving the up and down movement of the pedestal and swinging the dump bed. Hydraulic cylinders can be used for both dynamic drive and
Compared to simply providing separate hydraulic cylinders for the cradle and dump bed, the overall hydraulic structure and operation structure can be simplified, the improvement cost can be reduced, and the overall functionality and We were able to provide a working vehicle that is both economical and highly practical.

Next, embodiments will be described based on the drawings.

As shown in FIG. 1, a passenger driving section 3, a driving section 4, and an auxiliary loading platform 5 are installed in the lateral direction at the front ends of a pair of left and right main frames 2, which also serve as transmission cases, on which a plurality of drive wheels 1 are mounted in front and back. In addition to installing them side by side, chipping wagons, vacuum tanks,
A pedestal 6 for various attachments A, such as a manure spreader, is attached to the main frame 2, thereby forming a multi-wheeled working vehicle that performs various agricultural works by replacing the attachments.

To configure the attachment/detachment structure of the attachment A, as shown in FIGS. 1 to 5, the attachment is engaged from below with a pair of left and right parallel square pipe frames 7 attached to the attachment side, so that they can be separated from each other. A pair of left and right receiving frames 8 having an L-shaped cross section are connected to each other by a horizontal frame 9, and when the attachment is placed, the L-shaped receiving frame 8 and the square pipe frame 7 engage with each other, so that the attachment A is held horizontally. A pedestal 6 that prevents movement is formed, and the pedestal 6 can be freely raised and lowered via a pair of left and right pantograph devices 11 that are extended and driven in the vertical direction by a hydraulic cylinder 10 pivotally connected to the main frame side. It is attached to main frame 2.

Attachment A has two casters 14 attached to the legs 12 at the front and back to support it on the ground.
are equipped so that they can be freely switched between the retracted state and the ground support state by an operation, respectively, and the pedestal 6 with the attachment placed thereon is driven up as shown in Fig. 4 A, B, and C. In this state, the legs 12 are switched to the supporting posture, and in that state, the pedestal 6 is lowered and the legs 12 touch the ground, and the attachment A is
At the same time as making the support stand 6 stand on its own, the support frame 8 and the attachment side corner pipe frame 7 are separated from each other by the subsequent lowering of the support base 6, and the attachment A is removed.In addition, the attachment A is installed in the reverse order of the above. It is structured as follows.

An upper bending guide 8a is disposed on the upper end edge of the receiving frame 8, and an upper bending guide 8a is disposed on the upper end, and a rear bending guide 8b is disposed on the rear end edge. When connecting by raising the pedestal 6 to the attachment A which is in a predetermined self-raising position, the receiving frame 8 and the attachment side square pipe frame 7 are connected by the guiding action of the upper bending guide 8a. When the attachment A is moved in parallel from the rear side of the vehicle body by the casters 14 to the pedestal 6 positioned near the predetermined raised position, the holder frame 8 serves as a guide rail. The structure is such that the engagement and insertion of the tip of the square pipe frame 7 into the frame is smoothly guided by a rear bending guide 8b.

13 in the figure is fixed to the square pipe frame 7 so that when attachment A is attached by parallel movement from the rear side of the vehicle body, the movement of attachment A is restricted to a predetermined connection position by contact with the tip of the rear side guide 8b. This is a stopper.

At the front and rear of each receiving frame 8, a buckle-type fixing device 15 is attached to connect and fix the attachment A and the pedestal 6 by locking the fixing device 15a attached to the square pipe frame 7. The fixtures 15 are arranged at an angle so that their connecting forces generate a component that attracts each other, and not only fixes the attachment A and the pedestal 6 in the vertical direction, but also moves the attachment A back and forth with respect to the pedestal 6. Both fixtures 15 are configured to effectively exhibit their blocking function.

On the upper surface of each main frame 2, a pair of front and rear mounting stands 16 for receiving the attachment side corner pipe frame 7 in the lowered position are erected, so that the attachment A can be firmly mounted and supported in a predetermined mounted state. .

To configure the pantograph device 11, the front ends of two links 11a and 11b arranged in an "X" shape and pivotally connected at their intersections are separately pivotally connected to the pedestal 6 and the main frame 2. In addition, the rear ends of these links 11a and 11b are provided with sliding structures 17 and 1 for allowing the pantograph device 11 to expand and contract.
The interlocking frame 19 is horizontally connected to the links 11b, which are separately connected to the main frame 2 and the pedestal 6 via 8, and the front ends of the left and right pantograph devices 11 are pivotally connected to the main frame 2,
A piston rod 10a of a lifting hydraulic cylinder 10 is pivotally connected to the left and right center portions of the connecting frame 19 via a bracket member 19A.

To construct the sliding structures 17 and 18, supporting members 20 and 21 having elongated holes 20a and 21a extending in the front-rear direction are fixed to the main frame 2 and the receiving frame 8, and the support members 20 and 21 are fixed to the main frame 2 and the receiving frame 8, and The idling rollers 22, 23 attached to the ends are guided by the elongated holes 20a, 21a and are engaged in the elongated holes 20a, 21a so that they can freely roll only in the front-back direction. Guide members 24, 25 that prevent the rollers 22, 23 from falling out of the elongated holes 20a, 21a by contacting the sides of the links 11a, 11b, while allowing the back and forth movement of the rollers 23 through sliding contact with the side surfaces of the links 11a, 11b. is fixed to the main frame 2 and the receiving frame 8, and
Pantograph device 1 while keeping the structure as simple as possible
The structure is such that it can smoothly guide the expansion and contraction of 1.

As shown in FIGS. 2, 3, and 6,
A pair of left and right dump bed pivot joints 26 are fixed to the rear end of the main frame 2, and the attachment A
is removed, and with the pantograph device 11 shortened and retracted, the dump platform B can be freely dumped backward around its pivot axis P by inserting and removing the pivot pin 26a, and the loading platform 16 can be dumped. Main frame 2 is installed in a state where it also serves as a loading platform receiving member.
In addition, the piston rod 10a of the hydraulic cylinder 10 can be selectively pivoted to the pantograph device 11 side bracket member 19A and the pivot bracket 27 fixed to the dump bed B by replacing the pivot pins. By making it possible to connect the dump platform B, it is possible to attach the dump platform B and improve the operating rate, while the lifting and lowering of the pedestal 6 and the rocking drive of the dump platform B are performed using a single hydraulic cylinder 10. This is intended to simplify the overall hydraulic drive structure.

In the figure, reference numeral 28 denotes an elongated hole connecting the bracket member 19A and the main frame side so as to limit the extension stroke of the hydraulic cylinder 10 to a predetermined length when the hydraulic cylinder 10 is linked to the pedestal 6. It is a stroke limiter with a section, and when driving the dump bed B, the hydraulic cylinder 1
Although the dump platform B can be greatly extended over a predetermined range by greatly extending the hydraulic cylinder 10, the hydraulic cylinder 10 may be extended unnecessarily due to an erroneous operation when driving the platform 6 up and down. It is constructed to reliably prevent the platform 6 from rising excessively.

It should be noted that various improvements can be made to the specific structure of the leg 12 provided in the attachment A and the switching operation structure between the supporting state and the retracted state.

Various improvements can be made to the specific structure for receiving the attachment A of the pedestal 6 and the connecting and fixing structure, and various configuration changes can be made to the elevating structure of the pedestal 6.

Furthermore, the specific structure of the connecting portion 26 that pivotally connects the dump loading platform B in a detachable manner, and the hydraulic cylinder 1
Various improvements can be made to the alternative interlocking switching structure for the cradle 6 of 0 and the dump bed B.

[Brief explanation of drawings]

1 to 6 show embodiments of the present invention,
Figure 1 is an overall side view, Figure 2 is an enlarged side view showing the attachment attachment/detachment structure, Figure 3 is an enlarged plan view of the same, Figures 4 A, B, and C are views showing the attachment attachment/detachment procedure, and Figure 5 The figure is a sectional view taken along the line -- in FIG. 2, and FIG. 6 is a diagram showing the state in which the dump bed is attached. 6... pedestal, 10... hydraulic cylinder, 12...
Leg body, 26... Connection part, A... Attachment,
B...Dump loading platform.

Claims (1)

[Claims] 1. A cradle 6 for an agricultural attachment A having a ground support leg 12 that can be freely switched between a supporting state and a retracted state is provided so as to be movable up and down, and a connecting portion 26 is provided to pivotally connect a dump loading platform B in a detachable manner. , a multi-wheeled agricultural working vehicle in which a hydraulic cylinder 10 which can be selectively interlocked with the pedestal 6 and the dump bed B is provided.